Datasheet

VIPER / VIPER-Lite Embedded Linux Development Kit Quickstart Arcom Embedded Linux (AEL)

Parameter Description Default

outputen

Configures the polarity of the output enable signal.

A value of 0 indicates an active low signal while 1

indicates active high. This parameter corresponds

to the LCCR3[OEP] register.

outputen:1

pixclockpol

Configures the polarity of the pixel clock signal. A

value of 0 indicates a falling edge while 1 indicates

rising edge. This parameter corresponds to the

LCCR3[PCP] register.

pixclockpol:0

The required values for all of the parameters passed to the modprobe command are

generally defined in the datasheet for a given LCD panel. Often the timing parameters

(pixel clock, margins, sync pulse lengths) can be derived from values in the

datasheet along with a certain amount of trial and error. It is recommended that you read

chapter 7 of the PXA255 Processor Developers manual since many of the parameters

given to the driver correspond directly to settings in the LCD controller hardware.

The default parameter settings support a TFT type panel, so you can support a different

TFT panel by passing only the mode and timings parameters. For example, to support

a 640 x 480 panel such as the NL6448AC20 you would use the following command:

# modprobe pxafb options=mode:640x480-16,pixclock:39722,left:16,right:81,

upper:12,lower:31,hsynclen:63,vsynclen:2

The options string must be a single line with no spaces or line-breaks.

There is much greater variation between STN type panels, so it is necessary to pass all

parameters. For example, to support a Kyocera KCS057QV1AA-G00 320x240 single

panel color STN display you would use the following command:

# modprobe pxafb options=mode:320x240-8,pixclock:154000,left:1,right:1,

upper:0,lower:0,hsynclen:8,vsynclen:32,passive,color,single,outputen:1,pixclock

pol:0,hsync:1,vsync:1

CompactFlash IEEE802.11b WiFi card

To install a CompactFlash card, insert the card on the given slot on the board.

Note that the card goes upside down.

Further information on Wi-Fi card compatibility and usage can be found in the section

Wireless Network Configuration in the AEL Technical Manual. The AEL manual is on the

Development Kit CD in the /manuals/ folder.